*{
  margin: 0;
  padding: 0
}
ul,ol{list-style: none}
img{
  display: block;
}
.slider{
  width: 860px;
  height: 388px;
  margin-bottom: 30px;
  overflow: hidden;
  position: relative;
}
.slider li{
  float: left
}

#num{
  position: absolute;
  bottom: 10px;
  left: 45%;
}
#num span{
  display: inline-block;
  width: 16px;
  height: 16px;
  margin: 0 5px;
  text-align: center;
  font-size: 12px;
  background: #fff;
}
#num span.active{
  background: #f00;
  color: #fff;
}
.left{
  position: absolute;
  left: 0;
  top: 146px;
  font-size: 50px;
  color: #fff;
  cursor: pointer;
}
.right{
  position: absolute;
  right: 0;
  top: 146px;
  font-size: 50px;
  color: #fff;
  cursor: pointer;
}